motion under gravity - Category wise Question and Answer Practice Test with Solutions

Question : 11 [IAS (Pre) 2003]

If the radius of the Earth were to shrink by one percent, its mass remaining the same, the value of g on the Earth’s surface would

a) Increase by 2%

b) Increase by 0.5%

c) Decrease by 0.5%

d) Decrease by 2%

Question : 12 [UPPCS (Mains) 2013]

The Earth travels in its orbit at a speed of approx. 4,400 km per hour. Why do we not feel this high speed?

a) Our relative speed with respect to the Earth along the Earth’s orbit is zero

b) Because we are too small compared to the size of the Earth

c) The solar system as a whole is also moving

d) The gravity of the Earth constantly pulls us towards the Earth’s centre

Question : 13 [IAS (Pre) 1994]

The acceleration due to gravity of a destructive Earthquake will be

a) >750 cm/$s^2$

b) >550 cm/$s^2$

c) >950 cm/$s^2$

d) >980 cm/$s^2$

Question : 14 [UPPCS (Pre) 1992]

The two balls of iron and wood of same weight dropped from the same height, then

a) One falls first, another falls later

b) They reach the ground (Earth) at the same time

c) The wooden ball falls later

d) They reach the ground after some gap

Question : 15 [UPPCS (Pre) 2010]

If an apple is released from an orbiting spaceship, it will

a) Move at a lower speed

b) Fall towards the Earth

c) Move along with the spaceship at the same speed

d) Move at a higher speed